CA2069000A1 - Pressure Transducer with Flow-Through Measurement Capability - Google Patents

Pressure Transducer with Flow-Through Measurement Capability

Info

Publication number
CA2069000A1
CA2069000A1 CA2069000A CA2069000A CA2069000A1 CA 2069000 A1 CA2069000 A1 CA 2069000A1 CA 2069000 A CA2069000 A CA 2069000A CA 2069000 A CA2069000 A CA 2069000A CA 2069000 A1 CA2069000 A1 CA 2069000A1
Authority
CA
Canada
Prior art keywords
circular portion
pressure
conduit
electrodes
fluid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2069000A
Other languages
French (fr)
Other versions
CA2069000C (en
Inventor
Shih-Ying Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Setra Systems Inc
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2069000A1 publication Critical patent/CA2069000A1/en
Application granted granted Critical
Publication of CA2069000C publication Critical patent/CA2069000C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0001—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means
    • G01L9/0004—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means using variations in inductance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0001—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means
    • G01L9/0002—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means using variations in ohmic resistance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0001—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means
    • G01L9/0005—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means using variations in capacitance
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3331—Pressure; Flow

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

A transducer measures the pressure of a fluid within a hollow conduit, typically one with a circular cross-section, having a central region that is deformed to a non-circular cross-section.
This non-circular portion of the conduit displaces radially and repeatably without hysteresis in response to the pressure of the fluid in the conduit in a manner that corresponds to the pressure.
A variable capacitor assembly (26), or a set of strain gauges (A, B, C,D) mounted on the exterior of the non-circular portion, produce an electrical signal proportional to the radial displacement or to the strain, respectively. In one capacitive form (26) a pair of electrodes (24) are mounted on opposite sides of the non-circular portion formed as free end portions of metallic sheet members with a central channel. In another capacitive form (26') electrodes (24') are mounted at one or both ends of lever arms which in turn are coupled to the non-circular portion with a set of flexure plates (34,36) to produce a mechanical amplification of the radial displacement.
CA002069000A 1989-11-20 1990-11-05 Pressure transducer with flow-through measurement capability Expired - Fee Related CA2069000C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US439,617 1989-11-20
US07/439,617 US5024099A (en) 1989-11-20 1989-11-20 Pressure transducer with flow-through measurement capability
PCT/US1990/006393 WO1991007645A1 (en) 1989-11-20 1990-11-05 Pressure transducer with flow-through measurement capability

Publications (2)

Publication Number Publication Date
CA2069000A1 true CA2069000A1 (en) 1991-05-21
CA2069000C CA2069000C (en) 2000-01-11

Family

ID=23745431

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002069000A Expired - Fee Related CA2069000C (en) 1989-11-20 1990-11-05 Pressure transducer with flow-through measurement capability

Country Status (6)

Country Link
US (1) US5024099A (en)
EP (1) EP0500783B1 (en)
JP (1) JP2925319B2 (en)
CA (1) CA2069000C (en)
DE (1) DE69028924T2 (en)
WO (1) WO1991007645A1 (en)

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US5602339A (en) * 1994-03-24 1997-02-11 Dynisco, Inc. Injection molding machine pressure transducer with trapezoidal cavity
US5846257A (en) * 1997-08-15 1998-12-08 Nexus Medical System, Inc. Llc Pressure sensor for a surgical system
US6041658A (en) * 1997-11-18 2000-03-28 Kavlico Corporation Seat cushion pressure sensing system and method
CA2335457C (en) 1998-06-26 2007-09-11 Cidra Corporation Fluid parameter measurement in pipes using acoustic pressures
US6450037B1 (en) 1998-06-26 2002-09-17 Cidra Corporation Non-intrusive fiber optic pressure sensor for measuring unsteady pressures within a pipe
DE19900795C2 (en) * 1999-01-12 2003-01-30 Fraunhofer Ges Forschung forceps
US6463813B1 (en) 1999-06-25 2002-10-15 Weatherford/Lamb, Inc. Displacement based pressure sensor measuring unsteady pressure in a pipe
US6691584B2 (en) 1999-07-02 2004-02-17 Weatherford/Lamb, Inc. Flow rate measurement using unsteady pressures
US6536291B1 (en) 1999-07-02 2003-03-25 Weatherford/Lamb, Inc. Optical flow rate measurement using unsteady pressures
US6813962B2 (en) * 2000-03-07 2004-11-09 Weatherford/Lamb, Inc. Distributed sound speed measurements for multiphase flow measurement
US6601458B1 (en) 2000-03-07 2003-08-05 Weatherford/Lamb, Inc. Distributed sound speed measurements for multiphase flow measurement
US6785004B2 (en) * 2000-11-29 2004-08-31 Weatherford/Lamb, Inc. Method and apparatus for interrogating fiber optic sensors
US6443226B1 (en) 2000-11-29 2002-09-03 Weatherford/Lamb, Inc. Apparatus for protecting sensors within a well environment
US6782150B2 (en) * 2000-11-29 2004-08-24 Weatherford/Lamb, Inc. Apparatus for sensing fluid in a pipe
US6501067B2 (en) 2000-11-29 2002-12-31 Weatherford/Lamb, Inc. Isolation pad for protecting sensing devices on the outside of a conduit
US6558036B2 (en) 2000-11-29 2003-05-06 Weatherford/Lamb, Inc. Non-intrusive temperature sensor for measuring internal temperature of fluids within pipes
US6550342B2 (en) 2000-11-29 2003-04-22 Weatherford/Lamb, Inc. Circumferential strain attenuator
US6698297B2 (en) 2002-06-28 2004-03-02 Weatherford/Lamb, Inc. Venturi augmented flow meter
US7059172B2 (en) * 2001-11-07 2006-06-13 Weatherford/Lamb, Inc. Phase flow measurement in pipes using a density meter
US6971259B2 (en) * 2001-11-07 2005-12-06 Weatherford/Lamb, Inc. Fluid density measurement in pipes using acoustic pressures
AU2003255235A1 (en) * 2002-08-08 2004-02-25 Cidra Corporation Apparatus and method for measuring multi-phase flows in pulp and paper industry applications
US6893414B2 (en) * 2002-08-12 2005-05-17 Breg, Inc. Integrated infusion and aspiration system and method
US6768958B2 (en) * 2002-11-26 2004-07-27 Lsi Logic Corporation Automatic calibration of a masking process simulator
WO2004061399A2 (en) * 2002-12-30 2004-07-22 Nxstage Medical, Inc Pressure detector for fluid circuits
US6986276B2 (en) * 2003-03-07 2006-01-17 Weatherford/Lamb, Inc. Deployable mandrel for downhole measurements
US6837098B2 (en) * 2003-03-19 2005-01-04 Weatherford/Lamb, Inc. Sand monitoring within wells using acoustic arrays
US7570065B2 (en) * 2006-03-01 2009-08-04 Loadstar Sensors Inc Cylindrical capacitive force sensing device and method
US7451659B2 (en) * 2004-09-29 2008-11-18 Loadstar Sensors, Inc. Gap-change sensing through capacitive techniques
US7353713B2 (en) 2003-04-09 2008-04-08 Loadstar Sensors, Inc. Flexible apparatus and method to enhance capacitive force sensing
US20080264182A1 (en) * 2003-08-22 2008-10-30 Jones Richard T Flow meter using sensitive differential pressure measurement
US6910388B2 (en) * 2003-08-22 2005-06-28 Weatherford/Lamb, Inc. Flow meter using an expanded tube section and sensitive differential pressure measurement
US7480056B2 (en) * 2004-06-04 2009-01-20 Optoplan As Multi-pulse heterodyne sub-carrier interrogation of interferometric sensors
US7109471B2 (en) * 2004-06-04 2006-09-19 Weatherford/Lamb, Inc. Optical wavelength determination using multiple measurable features
US20060267321A1 (en) * 2005-05-27 2006-11-30 Loadstar Sensors, Inc. On-board vehicle seat capacitive force sensing device and method
US7337674B2 (en) * 2005-06-29 2008-03-04 Nx Stage Medical, Inc. Pressure detector for fluid circuits
US8092414B2 (en) 2005-11-09 2012-01-10 Nxstage Medical, Inc. Diaphragm pressure pod for medical fluids
US7503217B2 (en) * 2006-01-27 2009-03-17 Weatherford/Lamb, Inc. Sonar sand detection
US7343814B2 (en) * 2006-04-03 2008-03-18 Loadstar Sensors, Inc. Multi-zone capacitive force sensing device and methods
JP5237682B2 (en) * 2007-09-28 2013-07-17 東レエンジニアリング株式会社 Pressure measuring device
GB2498124A (en) * 2010-09-23 2013-07-03 Nxstage Medical Inc Pressure sensing methods, devices, and systems
GB2504644A (en) 2011-05-31 2014-02-05 Nxstage Medical Inc Pressure measurement devices, methods and systems
JP5914491B2 (en) * 2011-08-22 2016-05-11 日機装株式会社 Liquid channel pressure detector
TWM432034U (en) * 2012-02-13 2012-06-21 Autoland Scientech Co Ltd Pipe pressure diagnosis device
US9241641B2 (en) 2012-07-20 2016-01-26 Acist Medical Systems, Inc. Fiber optic sensor assembly for sensor delivery device
JP5469728B1 (en) 2012-10-19 2014-04-16 日機装株式会社 Liquid channel pressure detector
JP5587958B2 (en) 2012-10-19 2014-09-10 日機装株式会社 Ironing type pump
US9220834B2 (en) 2012-12-20 2015-12-29 Acist Medical Systems, Inc. Pressure sensing in medical injection systems
US9410422B2 (en) 2013-09-13 2016-08-09 Chevron U.S.A. Inc. Alternative gauging system for production well testing and related methods
JP5863871B2 (en) 2014-04-15 2016-02-17 日機装株式会社 Mounting member and ironing pump
WO2016208705A1 (en) 2015-06-24 2016-12-29 日機装株式会社 Blood purifying device
GB2543060A (en) * 2015-10-06 2017-04-12 Atmos Wave Ltd Sensing pressure variations in pipelines
JP6464238B1 (en) 2017-09-07 2019-02-06 日機装株式会社 Blood purification apparatus and method for discharging bubbles
JP6462077B1 (en) 2017-09-07 2019-01-30 日機装株式会社 Blood purification apparatus and method for discharging bubbles
US11209296B2 (en) * 2018-09-28 2021-12-28 Rosemount Inc. Non-intrusive process fluid pressure measurement system
CN113038981B (en) 2018-10-31 2023-02-28 阿西斯特医疗系统有限公司 Fluid pressure sensor protection
WO2021251311A1 (en) * 2020-06-12 2021-12-16 ファナック株式会社 Displacement detection device and torque sensor

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US2420148A (en) * 1943-11-08 1947-05-06 Douglas Aircraft Co Inc Pressure indicator
US3046788A (en) * 1960-08-04 1962-07-31 Baldwin Lima Hamilton Corp Fluid pressure electrical transducer
US3698249A (en) * 1970-08-03 1972-10-17 Umc Electronics Co Fluid pressure monitoring system
US4207551A (en) * 1976-03-12 1980-06-10 Hans Kautzky Pressure transducer
US4484479A (en) * 1978-04-05 1984-11-27 Richard Eckhardt Gas flow metering
EP0074574A1 (en) * 1981-09-14 1983-03-23 The Perkin-Elmer Corporation Flow-through fluid pressure transducer
JPH01249064A (en) * 1988-03-30 1989-10-04 Nikkiso Co Ltd Infusion tube occlusion detection device

Also Published As

Publication number Publication date
JPH05504401A (en) 1993-07-08
EP0500783B1 (en) 1996-10-16
JP2925319B2 (en) 1999-07-28
EP0500783A1 (en) 1992-09-02
CA2069000C (en) 2000-01-11
US5024099A (en) 1991-06-18
DE69028924D1 (en) 1996-11-21
WO1991007645A1 (en) 1991-05-30
DE69028924T2 (en) 1997-02-13
EP0500783A4 (en) 1993-02-24

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